OEM catalysts are often very dense and restrictive to gas flow. The Milltek Hi-Flow Sports Catalyst reduces restriction compared to OE catalysts, allowing for a freer-flowing exhaust system and improved engine performance. This product requires a Stage 2 ECU remap. - Reduces restriction over OE catalysts - Allows for free-flowing exhaust system - Improves engine performance - Requires Stage 2 ECU remap Specifications: - Pipe Diameter: 76.20 - Race Product: Yes - EMarked: No - MSCAT03: Universal Catalyst (200 CPSI EU4). 108 DIA x 250 LG - 76.2 ID - MSCAT03